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Region-of-interest scanning method based on FMCW solid-state scanning laser radar

A region of interest, scanning laser technology, applied in the re-radiation of electromagnetic waves, the use of re-radiation, measurement devices and other directions, can solve the problem that lidar cannot do custom line scan, custom time scan, etc. The time of frame scanning, the effect of reducing the number of points, and increasing the scanning frame rate

Pending Publication Date: 2021-11-16
HANGZHOU XIGHT SEMICON CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The invention discloses a region of interest (ROI) scanning method based on FMCW solid-state scanning laser radar, which mainly solves the problem that conventional laser radar cannot perform custom line number scanning and custom time scanning. The present invention is based on FMCW solid-state Scan the laser radar and use this type of laser radar to control the characteristics of its scanning area, realize direct control from the upper layer to the lower layer, and achieve the functions of custom line number scanning and custom time scanning, which can be used for smart security, smart city, unmanned Driving and assisted driving and other fields

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Embodiment Construction

[0055] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0056] It should be clear that the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0057] Terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0058] In order to make full use of the feature th...

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Abstract

The invention discloses a region-of-interest scanning method based on an FMCW solid-state scanning laser radar, which mainly solves the problem that the conventional laser radar cannot realize self-defined line number scanning and self-defined time scanning, and comprises the following implementation steps of: acquiring historical information according to the FMCW solid-state scanning laser radar, comprising position information and radial speed information of the point cloud; obtaining an ROI region as a scanning dot matrix of the next frame of the radar; performing environment supplementary optimization on the scene needing the environment information; and transmitting the obtained dot matrix information to the radar, and adjusting a scanning strategy by the radar according to the dot matrix. Based on the FMCW solid-state scanning laser radar and by utilizing the characteristic that the scanning area of the FMCW solid-state scanning laser radar can be controlled, direct control from the upper layer to the bottom layer is achieved, the functions of self-defined line number scanning and self-defined time scanning are achieved, and the method can be applied to the fields of intelligent security and protection, intelligent cities, unmanned driving, auxiliary driving and the like.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and relates to a method for scanning an area of ​​interest based on FMCW solid-state scanning laser radar, which can be used in the fields of smart security, smart city, unmanned driving and assisted driving. Background technique [0002] Traditional mechanical ToF lidar can only scan according to a fixed sequence of points, and the scanned information features do not contain velocity information. Therefore, traditional mechanical ToF lidar needs two or more frames of data to estimate velocity information in order to obtain velocity information. [0003] FMCW lidar is a radar with constant transmission power and continuous periodic change of optical carrier frequency (or phase). By means of coherent detection, the modulation frequency difference and relative The Doppler frequency difference introduced by the speed can demodulate the distance and speed of the target. Lidar based on frequency-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89G01S17/66
CPCG01S17/89G01S17/66
Inventor 黄锦熙金彬龙郭冕单子豪
Owner HANGZHOU XIGHT SEMICON CO LTD
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